Efficient. High-performing. Sustainably profitable.

The fundamental production principle of the STRING RIBBON™ wafers is just as clear as the idea of generating energy from the sun. It is based on the phenomenon of surface tension. Two thin filaments are pulled to the top through by a flat crucible with melted silicon. During this process, a silicon strip about 0.2 mm thick and 80 mm wide forms between the  filaments. It becomes crystalline when it cools and is then slowly pulled up so that it continually grows longer. Silicon strip segments (wafers) usually measuring 150 mm are cut off and then processed into solar cells and modules. Several hundred furnaces in our production lines make silicon strips from valuable solar silicon: Our modules, based on STRING RIBBON™ wafers, are produced with the highest level of efficiency. The wafers are already made with 50% less silicon than traditional silicon wafers. For us, this balanced technology is a clear market advantage. The fundamental production principle of the STRING RIBBON™ wafer is just as clear as the idea of generating energy from the sun. It is based on the phenomenon of surface tension. Two thin filaments per strip are pulled through each of our new quad furnaces, which produce four strips in parallel.

Less of the precious raw material is needed in comparison to conventional technology. Simply put, we produce 100% of the energy while using 50% less silicon and energy. The result is a product that takes less energy to produce and whose energy payback time is considerably reduced. The principle is based on the simplicity and efficiency of economy and ecology.